The Lockheed C-5 Galaxy was, in a way, a widebody aircraft before widebodies became prevalent. No, it doesn't feature two passenger aisles side by side, as it was primarily intended to carry machines ...
Though the company as we know it today didn't officially exist until 1995, iterations of Lockheed Martin have been manufacturing aircraft for the U.S. military and other governments for over 100 years ...
The C-5 has proven a reliable and durable airlift option, amongst the largest in the world, and the largest in the U.S.